This involves construction of the exploration tunnel and two running tunnels totalling 23km using traditional tunnelling techniques, and 46km of bored tunnels. The work is expected to take seven years to complete.

The consortium comprises Astaldi with a 42.5% share, Ghella also with 42.5%, and Oberosler Cav Pietro, Cogeis, and PAC each with a 5% stake. Construction will start as soon as the contract is signed.